You wash your hair in the morning and leave the house feeling as though it looks perfect. But by the evening, your roots are already looking greasy again. Your hair loses volume, becomes flat and lifeless, and that clean feeling barely lasts a few hours.
If this sounds familiar and happens to you regularly, it may be a sign that you have an oily scalp. We’re not just talking about your hair getting greasy after a few days, but about your roots becoming oily again very quickly.
It’s one of the things we’re told most often in the cockpit. And it’s almost always followed by the same conclusion: «Maybe I wash it too much». Let’s stop right there, because that idea might be leading you to wash your hair less often than your skin actually needs.
«Washing your hair too often is bad for you»: the myth we hear time and time again
It is one of the most widespread beliefs amongst those who sit in our treatment chair: washing your hair too often dries it out, damages it and, above all, makes it get greasy more quickly, as if the scalp were to «get used to it» and react by producing more oil.
The practical consequence of believing this is usually the same: washing less frequently. Going from washing every day to every three days. From every three days to every five. Just putting up with it.
But we often focus on how often we wash and forget to check what we use to wash ourselves and whether our routine is the right one. We choose a shampoo based on how our hair ends look, on a general recommendation, or because it promises to nourish the hair, without taking the needs of the scalp into account.
Your lengths may be dry and in need of conditioning, whilst your roots may require more frequent washing. Applying the same approach to both areas may leave you with soft ends, but a scalp that still feels greasy or weighed down.
That’s why the solution isn’t always to wash less: it’s Choose your products carefully, apply them where needed and adjust how often you use them to suit your skin’s needs. For some people, this may involve washing their hair daily with a shampoo that is suitable for their scalp and for that purpose.
Why does greasy hair show up sooner on straight hair?
In straight hair, particularly when it is fine, oiliness tends to become visible more easily: the roots lose volume and the hair quickly takes on a flat, lifeless appearance. For this reason, this type of hair may need washing more frequently.
That doesn’t mean that having straight hair necessarily means having an oily scalp, nor does it mean that curly hair can’t have an oily scalp. Texture influences how oiliness is perceived, but it does not, on its own, determine the condition of the skin.
That is why, at KAMI, we do not base our assessment solely on the appearance of the hair. We also examine the scalp and ask how the hair behaves between washes.
What happens to an oily scalp when you wash your hair less frequently?
Sebum doesn’t disappear just because you decide not to wash. It remains on your skin and hair, along with sweat, shed skin cells and product residue.
When you wash your hair less frequently than your scalp needs, you may notice:
- A denser, less voluminous root.
- A feeling of heaviness or a tight scalp.
- A build-up of residue that must be removed during the next wash.
Furthermore, cleanliness has an impact on the environment in which the scalp microbiota: the bacteria and yeasts that naturally live on our skin.
The build-up of sebum can encourage the proliferation of certain microorganisms, such as yeasts of the genus Malassezia, and contribute to flaking and discomfort in people who are predisposed to it. For this reason, washing too infrequently can lead to imbalances in this ecosystem.
That said, not all flaking or itching is caused by a lack of hygiene. If these symptoms persist, it is advisable to assess the cause before changing products or stepping up your skincare routine.
Having dry hair does not mean you have a dry scalp
This is another common misconception we see all the time, and it’s important because it completely changes the way you look after yourself.
Many people with dry, frizzy or curly hair assume that their scalp is dry as well. It’s an understandable assumption, but they are two different things. Hair is a fibre; the scalp is skin. You may have lengths that need conditioning and nourishment, whilst your roots tend to get greasy quickly.
When that happens and everything is treated as if it were dry — highly nourishing products applied close to the roots or washes spaced too far apart — the mid-lengths and ends may improve whilst the roots remain heavy.
The solution lies in treating each area according to its specific needs: thoroughly cleansing the scalp and caring for the lengths using the appropriate products and application methods.
So, how often should you wash your hair?
If you have an oily scalp, Washing it every day or every other day may be best, always using a shampoo chosen to suit your scalp’s needs and suitable for that frequency of use. It’s not about holding out until the next wash, but about maintaining a regular cleansing routine that feels comfortable for you.
We often realise that our facial skin needs to be cleansed every day, but we try to go several days without washing our scalp. The scalp is also skin and needs looking after, although the frequency and products will need to be tailored to their specific circumstances.
Proper cleansing helps to remove excess sebum, sweat and debris. It also helps to maintain conditions that are conducive to the balance of the microbiota: the microorganisms that naturally inhabit our skin. The aim is not to eliminate them, but to prevent a build-up that could lead to imbalances and discomfort.
And this is where something we emphasise a great deal comes in: it matters just as much with what you wash yourself like how. At KAMI, we review your routine and provide personalised recommendations to make your at-home skincare routine more effective.
How we approach this at KAMI
At KAMI, we work with the The KAMI Method, our own approach to hair care. It draws on the tradition of the Japanese head spa, but is adapted to our own understanding of the treatment and the experience, and starts with a simple principle: Before you start, have a look.
No session begins without first assessing the condition of your scalp and finding out about your routine. An oily scalp may also be sensitive or flaky, and does not require the same care as roots that simply have product build-up.
It is this assessment that determines the products we choose and the amount of manual labour involved.
In cases of an oily scalp, the aim is not to «dry out» the roots by using products that are too harsh. It is carry out a thorough clean, remove any build-up and provide guidance on home maintenance.
Depending on the needs we identify, we can recommend the Detox Ritual or the O2 Therapy, which allows you to combine scalp care with a treatment for the mid-lengths and ends.
The choice depends on both the condition of your skin and the needs of your hair. A treatment session can form part of your skincare regime, but it is no substitute for your at-home routine, nor does it guarantee a permanent change in sebum production.
When this goes beyond our remit
We’d rather be clear about this: not everything can be sorted out with a hair treatment.
If the oily skin is accompanied by persistent itching, redness, pain or recurrent flaking, we would recommend that you have it assessed by a trichologist.
The seborrhoeic dermatitis, for example, should not be confused with a simple build-up of dirt and may require specific medical treatment.
At KAMI, we work with trichologists and tailor your hair care routine to the treatment you’re following with them, following their advice. If you are already receiving treatment, it is important that you let us know so that we can choose the right care for you.
Our job is to look after your scalp and support you, without diagnosing conditions or replacing medical treatment. We believe that well-coordinated care is part of doing things properly.
Frequently asked questions about an oily scalp
Is it bad to wash your hair every day?
Not necessarily. If your scalp needs it, washing your hair every day may be fine, provided you use a shampoo suited to your scalp’s needs and suitable for frequent use. The important thing is that washing leaves your scalp feeling comfortable and that your routine also looks after the mid-lengths and ends.
Does the fact that my hair is dirty by the third day mean I have an oily scalp?
Not on its own. The fact that hair loses its cleanliness over the course of a few days is different from the roots looking greasy again just a few hours after washing. You also need to take into account the products used, physical activity and other signs relating to the scalp.
Can I have an oily scalp even if my hair is curly or has dry ends?
Yes. The needs of the roots and those of the lengths can be different. That’s why we check both and adapt the routine, rather than treating all the hair as if it needed the same thing.
Is dry shampoo suitable for an oily scalp?
It can get you out of a tight spot, but it’s no substitute for washing: it absorbs some of the oil and temporarily improves the appearance of your hair. If you use too much, it can leave a residue and cause irritation, so it’s best to use it only when necessary.
How often should you have a head spa treatment?
At KAMI, we assess this during your first session, based on the condition of your scalp, the aim of the treatment and your home care routine. Having oily roots doesn’t necessarily mean you need regular sessions. We won’t suggest more than you need.
In summary
- Washing your hair when it needs it doesn’t make it get greasy any faster.
- Spacing out washes to «get the roots used to it» usually results in build-up, flaking and inflammation.
- Dry hair and a dry scalp are not the same thing, and confusing the two means you’ll end up treating them the wrong way round.
- The right frequency is the one your skin needs, not a general rule.
- If there is an underlying issue, it should be assessed by a medical professional.
If you’ve been struggling for a while with roots that get greasy just a few hours after washing your hair, the first step is to understand what’s going on. In a head spa treatment at KAMI We examine your scalp and discuss with you how to look after it. From there, we advise you on the most suitable routine and treatment for you, or recommend a medical assessment if you need one.